F.91 Data Sheet MJS-p-0347

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Felsenthal, Polhemus Celestial Computer, 1962-1963

Serial Number or Date Stamp:

Country: USA

Primary construction material: pl

Case included?: yes

General Description: Specialty circular aviation slide rule

Length of 1 decade = 4 in, and overall scale length = 15 in. The largest physical dimension is 9 in.

Front Scales: AzTru [ ZnTru LatSet ] [ GSset GScorr Corio ] ZN-TR StarAz BodMot PolQfac PolAz

Back Scales:

Notes: Type CPU-41/P, patent applied, Part FAA-112; used with sextant measurements of stars to determine course during flight; 7 plotter scale overlays – 65-55-45-35-25-0-0d eg; Sperry Gyro Coord. Conv. Calculator; vinyl case; Lt. Col. G.A. Bailey, WHSC, 2 Jan 66 on case.

References: https://www.madeinchicagomuseum.com/single-post/g-felsenthal/, https://ppubs.uspto.gov/dirsearch-public/print/downloadPdf/3109588)

Date Acquired: 08/01/2024